Sig MPX or MPX?? - AR15.COM

Posted: 3/18/2016 1:23:46 AM EDT

For those with approved SBR's through F1's or F'4's, what was the actual model listed?

I'v read responses to various threads and forums with folks likst one or the other in the title.

Much confusion, and I don't want to risk a disapproval at this point for this one thing!
Please help.

Thanks in advance.

Posted: 3/18/2016 3:19:24 AM EDT

[#1]

My suggestion is to use what's engraved on your firearm being form 1ed.

Posted: 3/18/2016 7:46:17 AM EDT

[#2]

I used "Sig MPX" and it was approved.

Posted: 3/18/2016 9:45:54 AM EDT

[#3]

On the ATF eForms drop down they have 2 options:

MPX
SIG MPX

I chose the latter, as thats what roll marked on the side of the lower. My form1 is still pending, so cant say how successful that was.

For MCX they make it slightly more complicated with 3 options:

MCX
SIGMCX
SIG MCX

the last one is, once again, whats on the lower.

I would be very reluctant to choose anything not on their list. My MPX was more like an MPX-C carbine, so I wanted to type in the correct nomenclature, but I resisted and took whats written on the lower. Hard to argue with that.

Posted: 3/18/2016 10:32:48 AM EDT

[#4]

Here is the thing with the drop down menu on the ATFonline website. All the info on there is user created and any idiot can make a model and it will show up on there.

That being said, I did MPX on my eFile form 1 and its approved.

Posted: 3/18/2016 12:10:39 PM EDT

[#5]

Quote History

Quoted:
Here is the thing with the drop down menu on the ATFonline website. All the info on there is user created and any idiot can make a model and it will show up on there.

That being said, I did MPX on my eFile form 1 and its approved.

View Quote

At first it seems that way, but if it was really anything any idiot typed it, the list would be far longer and dumber. I am sure more than one person has used "MPX-P" or "MPX-C" but neither are on the list. I expect is only values which have been approved or such. I deal with stupid things people enter on web forms every day. The ATF list is amazingly clean if thats the case.

I agree, rule #1: use whats written on the side of the damn gun.

Posted: 3/18/2016 2:15:26 PM EDT

[#6]

Quote History

Quoted:

At first it seems that way, but if it was really anything any idiot typed it, the list would be far longer and dumber. I am sure more than one person has used "MPX-P" or "MPX-C" but neither are on the list. I expect is only values which have been approved or such. I deal with stupid things people enter on web forms every day. The ATF list is amazingly clean if thats the case.

I agree, rule #1: use whats written on the side of the damn gun.

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Quote History

Quoted:

Quoted:
Here is the thing with the drop down menu on the ATFonline website. All the info on there is user created and any idiot can make a model and it will show up on there.

That being said, I did MPX on my eFile form 1 and its approved.

At first it seems that way, but if it was really anything any idiot typed it, the list would be far longer and dumber. I am sure more than one person has used "MPX-P" or "MPX-C" but neither are on the list. I expect is only values which have been approved or such. I deal with stupid things people enter on web forms every day. The ATF list is amazingly clean if thats the case.

I agree, rule #1: use whats written on the side of the damn gun.

This was taken from the other thread from the Sig drop down list. Glock 17 and DracoC are on that list. User input.

Posted: 3/18/2016 3:06:29 PM EDT

[#7]

I put MPX

Posted: 3/18/2016 5:07:15 PM EDT

[#8]

Shit. Sent them an email, hopefully they can correct mine.

Posted: 3/18/2016 5:44:24 PM EDT

[#9]

Quote History

Quoted:
Shit. Sent them an email, hopefully they can correct mine.

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Once it is submitted you can't change it. They will let you re-submit as soon as it is denied and they will expedite approving it but it will cost you another $200. It takes close to 90 days to get your original $200 back in the refund.

Posted: 3/18/2016 6:44:45 PM EDT

[#10]

"Sig MPX" here and it was approved on my Form 1.

Posted: 3/18/2016 6:55:56 PM EDT

[#11]

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Quoted:

Once it is submitted you can't change it. They will let you re-submit as soon as it is denied and they will expedite approving it but it will cost you another $200. It takes close to 90 days to get your original $200 back in the refund.

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Quoted:

Quoted:
Shit. Sent them an email, hopefully they can correct mine.

Once it is submitted you can't change it. They will let you re-submit as soon as it is denied and they will expedite approving it but it will cost you another $200. It takes close to 90 days to get your original $200 back in the refund.

Fuuuuuuck

Posted: 3/18/2016 8:01:46 PM EDT

[#12]

I just put MPX and was approved

Posted: 3/18/2016 11:08:31 PM EDT

[#13]

Quote History

Quoted:
My suggestion is to use what's engraved on your firearm being form 1ed.

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Except this Sig P516 does not conform (I suspect due to it's manufactured as a 'pistol' classification). The lower receiver does not have the model engraved. My form 1 status is now 'Pending Research'.

Posted: 3/18/2016 11:21:58 PM EDT

[#14]

Quote History

Quoted:
Here is the thing with the drop down menu on the ATFonline website. All the info on there is user created and any idiot can make a model and it will show up on there.

That being said, I did MPX on my eFile form 1 and its approved.

View Quote

I was wondering about this myself. So I would assume if it does show up in the drop down, it was researched and approved by the ATF... (silly assumption i'm sure).

Posted: 3/19/2016 11:08:47 AM EDT

[#15]

So BOTH "Sig MPX" and " MPX" are acceptable is what I'm gathering here.

Posted: 3/19/2016 12:02:53 PM EDT

[#16]

Quote History

Quoted:
So BOTH "Sig MPX" and " MPX" are acceptable is what I'm gathering here.

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I actually had the same question back when I submitted my form 1. I used "ask the experts" however I never received a response back. I just submitted it with the model as "MPX" and it was approved, HOWEVER recently I have seen a lot more rejected forms for the model name not matching exactly what is engraved on the firearm. I would use "sig mpx" if I were to submit another form 1 today. Just my opinion of course, but after seeing the scorpion evo forms getting kicked back for not Including "CZ scorpion evo 3 S1" as the model I would type it exactly as it appears on the lower, which is "sig mpx".

Posted: 3/19/2016 12:30:16 PM EDT

[#17]

Well.....I guess I screwed up a also as I didn't see an SIG MPX or MPX option in the drop down so I submitted it in the eform system as a non classified model type with a picture included. I wonder what they will do with that since it's still pending research.

Edit. For the manufacturer I selected Sig Arms (SIG SAUER) and then I created my own weapon type SIG MPX. I wonder it will even make it through research without being rejected.

Posted: 3/20/2016 1:35:40 PM EDT

[#18]

Quote History

Quoted:
So BOTH "Sig MPX" and " MPX" are acceptable is what I'm gathering here.

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If you are lucky.

Do what's engraved on the firearm so you don't have to depend on luck.

Posted: 3/21/2016 3:41:30 PM EDT

[#19]

Also take pictures of the model and serial number and submit them with it.

Posted: 3/21/2016 3:50:57 PM EDT

[#20]

I had MPX-P and it got rejected last week. The examiner specially stated it is listed as Sig MPX on the reciever and the paperwork must say Sig MPX. I resubmitted and it got approved on Saturday 3/19.

Posted: 3/22/2016 1:36:41 AM EDT

[#21]

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Quoted:
I had MPX-P and it got rejected last week. The examiner specially stated it is listed as Sig MPX on the reciever and the paperwork must say Sig MPX. I resubmitted and it got approved on Saturday 3/19.

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I originally put "MPX" on a paper form and it was rejected about a month ago. My examiner also suggested that "Sig MPX" was the correct answer. I corrected it and re-sent it in an got it back as approved in less than 10 days.

Posted: 3/24/2016 9:42:48 AM EDT

[#22]

Quote History

Quoted:
Well.....I guess I screwed up a also as I didn't see an SIG MPX or MPX option in the drop down so I submitted it in the eform system as a non classified model type with a picture included. I wonder what they will do with that since it's still pending research.

Edit. For the manufacturer I selected Sig Arms (SIG SAUER) and then I created my own weapon type SIG MPX. I wonder it will even make it through research without being rejected.

View Quote

hmmm....I guess they were ok with what I did since I included pictures and everything. Will they normally approve a research item if they see an issue with how it was input?

This is to advise you that the status of your eForms submission with the subject Permit/Control number has changed to SUBMITTED/IN PROCESS

Posted: 3/24/2016 10:49:12 AM EDT

[#23]

I've got an approved Form 2 and Form 4 with "MPX" as the model. Since it was 2-4, the Form 2 is the important one. I've seen a few Form 1's with MPX as the model that were approved as well.

Technically, i think they are wanting "SIG MPX" now.

Posted: 5/2/2016 4:51:32 PM EDT

[#24]

Quote History

Quoted:

hmmm....I guess they were ok with what I did since I included pictures and everything. Will they normally approve a research item if they see an issue with how it was input?

This is to advise you that the status of your eForms submission with the subject Permit/Control number has changed to SUBMITTED/IN PROCESS

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Quote History

Quoted:

Quoted:
Well.....I guess I screwed up a also as I didn't see an SIG MPX or MPX option in the drop down so I submitted it in the eform system as a non classified model type with a picture included. I wonder what they will do with that since it's still pending research.

Edit. For the manufacturer I selected Sig Arms (SIG SAUER) and then I created my own weapon type SIG MPX. I wonder it will even make it through research without being rejected.

hmmm....I guess they were ok with what I did since I included pictures and everything. Will they normally approve a research item if they see an issue with how it was input?

This is to advise you that the status of your eForms submission with the subject Permit/Control number has changed to SUBMITTED/IN PROCESS

I'm in the middle of trying to Form1 my Sig m400 pistol in 300 blk, on eForms. The Manuf verification button will only accept the verification/input of "Sig Arms (Sig Sauer)", but my lower has "Sig Sauer Inc" engraved

. The model and caliber is nowhere on the lower either, very odd. The upper receiver has M400 engraved into it, so I was going to put what the eForms verification system wants to see "Sig Arms (Sig Sauer)" and the Model as "M400" (I have the pistol version of the M400). Apparently "Sig Arms (Sig Sauer)" worked for halflife...

What are you all using "Sig Arms (Sig Sauer)" or "Sig Sauer Inc"??

Posted: 5/3/2016 9:01:41 AM EDT

[#25]

Quote History

Quoted:
I'm in the middle of trying to Form1 my Sig m400 pistol in 300 blk, on eForms. The Manuf verification button will only accept the verification/input of "Sig Arms (Sig Sauer)", but my lower has "Sig Sauer Inc" engraved

. The model and caliber is nowhere on the lower either, very odd. The upper receiver has M400 engraved into it, so I was going to put what the eForms verification system wants to see "Sig Arms (Sig Sauer)" and the Model as "M400" (I have the pistol version of the M400). Apparently "Sig Arms (Sig Sauer)" worked for halflife...

What are you all using "Sig Arms (Sig Sauer)" or "Sig Sauer Inc"??

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I have a F1 pending on a M400 pistol in 5.56. I used "Sig Arms (Sig Sauer)" for the manufacturer and "SIG M400" for the model (which is engraved on the upper receiver).

Posted: 5/3/2016 1:03:34 PM EDT

[#26]

Thanks.

I went ahead and did 'SIG SAUER INC' and 'SIGM400', which is exactly what's on the lower and upper, then attached pics ("caliber' and "300" too).

Ehh, might be a little longer wait. People seem to be getting their 'pending research' status updated to 'submitted/pending' after about a week.

Its crazy how loose all the manufacturers are with their markings and how strict the Form 1 needs to be. Maybe that's not a coincidence

.

eta my lower has no caliber, multi, not anything marked/related to the rounds, etc. engraved on it. The barrel is marked though.

Posted: 5/4/2016 11:42:29 AM EDT

[#27]

I had the pistol originally so I used MPX-P. It was rejected and I had to resubmit and got approved the next day. Use MPX.

Posted: 5/4/2016 2:04:10 PM EDT

[#28]

MPX was denied for me. Examiner emailed me directly with the instructions to use SIG MPX and I was approved immediately after submitting.

Posted: 5/9/2016 6:46:59 PM EDT

[#29]

I know someone who put MPX and was approved. I put MPX when I submitted the other day and I'm nervous because a denial would put me past the deadline for 41F. I emailed someone at the ATF to see if MPX is correct or if it has to be Sig MPX, we'll see if I get a response.

Posted: 5/11/2016 1:41:05 PM EDT

[#30]

Any updates on "MPX" vs. "SIG MPX"?

Thanks

Posted: 5/11/2016 10:19:03 PM EDT

[#31]

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Quoted:
Any updates on "MPX" vs. "SIG MPX"?

Thanks

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SIG MPX

/thread

Posted: 5/14/2016 6:47:34 AM EDT

[#32]

Just got the fix it letter for having just MPX as the model. Will send out today with SIG added. In my letter they didn't say what it needed to be changed to, so it was good that I these discussions have popped up. My form 1 was sent to them on 1/16/16.